kernel_samsung_sm7125

jenna

History

Thomas Gleixner 41d2e49493 hrtimer: Tune hrtimer_interrupt hang logic The hrtimer_interrupt hang logic adjusts min_delta_ns based on the execution time of the hrtimer callbacks. This is error-prone for virtual machines, where a guest vcpu can be scheduled out during the execution of the callbacks (and the callbacks themselves can do operations that translate to blocking operations in the hypervisor), which in can lead to large min_delta_ns rendering the system unusable. Replace the current heuristics with something more reliable. Allow the interrupt code to try 3 times to catch up with the lost time. If that fails use the total time spent in the interrupt handler to defer the next timer interrupt so the system can catch up with other things which got delayed. Limit that deferment to 100ms. The retry events and the maximum time spent in the interrupt handler are recorded and exposed via /proc/timer_list Inspired by a patch from Marcelo. Reported-by: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Marcelo Tosatti <mtosatti@redhat.com> Cc: kvm@vger.kernel.org		15 years ago
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Kconfig	…
Makefile	…
clockevents.c	clockevents: Add missing include to pacify sparse	15 years ago
clocksource.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	15 years ago
jiffies.c	…
ntp.c	…
tick-broadcast.c	…
tick-common.c	…
tick-internal.h	…
tick-oneshot.c	nohz: Allow 32-bit machines to sleep for more than 2.15 seconds	15 years ago
tick-sched.c	Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	15 years ago
timecompare.c	clocksource/timecompare: Fix symbol exports to be GPL'd.	15 years ago
timeconv.c	…
timekeeping.c	Merge branch 'timers-for-linus-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	15 years ago
timer_list.c	hrtimer: Tune hrtimer_interrupt hang logic	15 years ago
timer_stats.c	const: constify remaining file_operations	16 years ago